Tin-lined lead pipe.



A. BARHACLDUGH.

TIN 'LINED LEAD PIPE.

(Application led Dec. 27, 1897.)

(No Model.)

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, ing twine, asbestos, yarn, wire, or other equiv- Uniden rares ,arentEIGHTHS TO HARRY HARDVVIOK, OE PHILADELPHIA, PENNSYLVANIA.

TiN-LINED LEAD PIPE.

SPECFIGATION forming part of Letters Patent No. 666,241, dated January15, 1901. Application liled December 27, 1897. Serial No. 663,635. (Nomodel.)

To all whom it may concern:

Be it known that I, ALBERT BARRAOLOUGH, a subject of the Queen of GreatBritain and Ireland, and a resident of Hecktnondwike, county of York,England, have invented certain Improvements in Tin-Lined Lead Pipes, ofwhich the following is a specification.

One object of my invention is to so construct a tin-lined lead pipe asto prevent contact of the tin with the lead, a further object being toprovide for the expansion of the tin lining independently of the leadpipe, and a still further object being to provide a simple and eiiicientjoint for tin-lined lead pipes. These objects I attain in the mannerhereinafter set forth, reference being had to the accompanying drawings,in which- Figure l is a perspective view of a piece of tin-lined leadpipe constructed in accordance with my invention. Fig. 2 is a transversesection of the pipe. Fig. 3 is a transverse section of a special form ofpipe embodying my invention, and Fig. 4. is a longitudinal section of ajoint for tin-lined lead pipes constructed in accordance with myinvention.

In that class of tin-lined lead pipes in which the tin lining is indirect contact with the lead chemical action sometimes oocurs,whichinjures the tin lining. I therefore interpose between the lead pipe land the tin lining 2 a non-metallic body 3, which will prevent contactof the tin lining with the lead pipe, and thus overcome theobjectionable action referred to. rThis interposed nonmetallic body mayconsist of any ordinary form of cementveomposition introduced either bypouring it into the space between the pipe and lining or by forcing itinto said space by means of a suitable pump or drawing it in by firstinducing a partial vacuum in said space, the concentricity of the pipeand lining being insured by wrapping spirally around said linalentmaterial, or it may be preferable in some cases to use as the interposedbody some elastic or semi-elastic material which will permit of alimited amount of contraction of the pipe l or expansion of the lining 2Without the one affecting the other. rlhe interposed medium is also bypreference of such charac-l ter that it will serve as a non-conductor ofheat, so as to prevent loss of heat by radiation in case the pipe isintended for conveyance of heated liquids or, on the other hand, toprevent freezing of the contents of the pipe in cold weather.

The non-metallic body is applied to the tin pipe by wrapping or coveringthe latter therewith in any suitable way, the covered tin pipe beingthen inserted into the lead pipe and secured therein by contracting saidlead pipe by external pressure applied thereto, the ductility of thelead pipe permitting such contraction of the same.

Vhen the pipe is intended for use in exposed situations, I prefer tocorrugate the tin lining, as shown in Fig. 3, so that it is free toexpand within certain limits without exerting undue pressure upon thecontainingpipe.

In joining together pipes constructed in accordance with my invention Iprefer to adopt the plan shown in Fig. 4, on reference to which it willbe observed that one pipe has the lead covering and interposed bodystripped from the tin lining for a short distance back from the end ofthe latter, which is preferably beveled or skived to a feather-edge, asshown. The end of the other pipe is expanded slightly, so that theexposed projecting end of the tin lining can enter the same, the degreeof expansion being preferably such that the tin linings will fit snuglyone to the other, the ends of the lead pipes and interposed bodiesabutting against each other. After this has been effected a solder orwipe joint 5 is formed over the meeting ends of the pipes in the samemanner as in forming such joints on ordinary lead pipes.

Having thus described my invention, I claim and desire to secure byLetters Patentl. A tin-lined lead pipe having a non-metallic bodyinterposed between the pipe and the lining, so as to prevent contact ofthe two, said interposed body being held in compressed condition uponthe lining by the ductile lead pipe, substantially as specified.

2. The mode herein described of producing a tin-lined lead pipe, saidmode consisting in first applying to the tin pipe a non-metalliccovering, then inserting said covered pipe in the lead pipe, and thencompressing the lat- IOO ter upon the covering of the tin pipe bypressure externally applied to the lead pipe, substantially asspecified.

3. A tin-lined lead pipe having interposed between the pipe and lining anon-metallic body which is a non-conductor` of heat, substantially asspecified.

4. A tin-lined lead pipe having the lining corrugated and having anon-metallic body interposed between the pipe and lining, substantiallyas specified.

5. A joint for tin-lined lead pipes in which the tin lining of one pipeprojects into the expanded tin lining of an adjoining pipe,substantially as specified.

In testimony whereof I have signed my naine to this specification in thepresence of two subscribing witnesses.

lALBERT BARRACLOUGI-I. Witnesses:

HERBERT MELLOR, GEORGE R. BUCKLEY.

